James -
> Using = when Vim was built with -cindent and the user hasn't set
> 'equalprg' filters the text through the external command `indent'. As
> this behavior isn't documented, it's a surprise to the user and can
> cause the text-to-be-indented to be deleted or replaced with error
> messages from the shell.
This is old Vi behavior, AFAIK.
> The attached patch is a proposed solution which instead emits an error
> telling the user that 'equalprg' needs to be set. I've added the
> explanation to ='s help as well, with a help tag for the new error
> number.
I don't think changing the behavior is a good idea. I'll add a comment
at 'equalprg' about what happens when it's empty. And in change.txt:
={motion} Filter {motion} lines through the external program
given with the 'equalprg' option. When the 'equalprg'
option is empty (this is the default), use the
internal formatting function |C-indenting|. But when
'indentexpr' is not empty, it will be used instead
|indent-expression|. When Vim was compiled without
internal formatting then the "indent" program is used
as a last resort.
- Bram
--
For society, it's probably a good thing that engineers value function over
appearance. For example, you wouldn't want engineers to build nuclear power
plants that only _look_ like they would keep all the radiation inside.
(Scott Adams - The Dilbert principle)
/// Bram Moolenaar -- b...@moolenaar.net -- http://www.Moolenaar.net \\\
/// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
\\\ download, build and distribute -- http://www.A-A-P.org ///
\\\ help me help AIDS victims -- http://ICCF-Holland.org ///
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